Power shovel



Nov. 1, 1932. n 5 L UTESl 1,885,741

POWER SHOVEL Filedoci. Y, 1951 g/ zz /7 I INVENTOR WITNESS 'z'zson ,ues

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ATTORNEY Patented Nov. 1, 1932 UNITED sTATEs parat oFFiCl- SIMPSON LUTES, OF LOUISVILLE, KENTUCKY i POWER SHOVEL i Application filed October 7, 1931. Serial No. 567,481?.l

sides of the teeth but the proper thrusts will be maintained at all times. f

A further object of the invention is the provision of a dipper tooth having a body portion which is secured in Hat contact with the inner face of the bottom of a scoop, the body having an extension located at an acute angle tothe bottom of the scoop` and projecting outwardly and downwardly from the free edge of the scoop and a flat face on the extension having a bit secured thereto with the opposite edges of the bit being available for penetrating purposes when the bit is properly adjusted. n This invention will be best understood from a consideration of the following detailed description, in view of the accompanying drawing forming a part of the specilication; nevertheless, it is to be understood that the invention is not confined to the disclosure, being susceptible of such changes and modifications which shall define no material departure from the salient features of the invention as expressed in the appended claim.

In the drawing:

Figure 1 is a side view in elevation of a scoop showing my invention applied thereto,

Figure 2 is a transverse vertical section taken on the line 2 2 of Figure 3,

Figure 3 is a longitudinal vertical section of the dipper tooth and scoop, and

Figure 4 is a fragmentary horizontal sec- 35 tion taken along the line 4 4 of Figure 1.

Referring more particularly to the drawing, 10 generally designates a shovel or scoop adapted to be employed in connection with excavating machines and dredging machines in which dipper teeth are formed integrally with the bottom [face of the scoop or se- Y cured thereto, but` such Yteeth are 'normally placed in a plane which is parallel'to the plane of the bottom of the scoop so that the teeth extendV directly forwardly in a direct line from the bottom of the scoop. In such Vconstructions the dipper teeth do nothavel the proper angle so that when the scoop is thrust toward the ground the teeth will not always engage 1n the soll. v

I In the presentinstance the dipper tooth Vis providedwith a body 11 having a cut-out portion 12 thereby leaving the side walls 13 and presenting a channel anda base portion 14..

The outerface of thebody is shown `at 15a 65 and is substantiallyflat and lies in contact Awith theinner face of the bottom 15 of the scoop 10. n p i l It will be noted that` the outer face ofthe base portion 14 is steppedand passages 16 '70 are provided vto receive Abolts 19. The heads 17 of the bolts are countersunk within similar openings in the bottom V15 of thefscoop 10.

vThe bolts extend through the base portion14 and are secured in placefbymeans of nuts '18 which restuponthe stepped` ,sections of the outer face-fof the base portion 14. These -bolts may be made square in order to prevent turning of the sameand the passages -16y are similarly constructed.

'An extension 20.

, projects youtwardlyl and lupwardly at an acute angle to the flat portion 15at ofthe body of the dipper tooth. The inner face of the extensionis stepped to receive nuts 21 threadedonto bolts 22 which 35 are received by 'alined passages in the eX- tension and a bit 25. In order to providel the stepped sections the extension y2Ois cut out to provide a channel 23 and side walls 24. n "The bit'25; is secured in fiat contact to the 90 outer flat face 26 ofthe extension 2O by the `bolts 22. `The passages 27 are counter'sunk at one end and are spaced equal distances apart to receive the bolts 22 and also the heads 18a.` These bolts are square in cross section and the passages 27 are likewise similarly constructed in order to prevent turning of the bolts.

rlhe forward edge of the bit 25 is provided with a bevelled cutting edge 28 which is 00 adapted to penetrate the ground when the scoop or shovel is thrust toward the ground. The opposite end of the bit is square as shown at 29 and is adapted to be ground oif at a proper angle when it is desired to use this end of the bit instead of the edge 28.

It will be notedthat the bit 25 by the present construction is inclined at an angle to the bottom l5 of the scoop 10 so that the cut- 0 ting edge 28 of the bit projects slightly belowV the inner face of the bottom of the'scoop. Due to the angle of inclination of the bit 25 Y j the dipper teeth will always be in a condition Y to penetrate the ground as the scoop is moved toward the ground at the proper angle.

Y The construction also provides forY the e ready removal of the bits 25 when itis lde- Y sired to tool the bits and the spacing of the passages 27 provides for ready adjustment of therbits towards the outer free endof the extension 20. Vhen the cutting edgesY 28 are worn down suiiciently so that they will require replacement, the bits may be turned .around and the ends 29 sharpened to provide V Apenetrating portions. Due to the equal spacing of the passages27 the sharpened ends 29 may be placed in position where the cutting edges 28 are shown in Figure 3. VVIn other j f "words, the bits maybe reversed at will and as `-30 the cutting edges wear down the bits may be shifted outwardly and-secured in place by :the bolts 22. j f

' The angular disposition of the bits 25-also Y provides Jfiorequal distribution loi? wear on `both sides of the cutting edges 28, thus preventing the unusual ,wear on the under face l of the bits. 7 l

- j Inapower shovel,-a scoop,- a dipper tooth 40 having a body which is triangular in shape Athereby providing three faces, one face orm- 4 ing the bottombeing lat and havingv a por- ,y

.tion adapted to be secured to the inner face j of the bottom of the scoop, the remaining portion of the flat face projecting beyond the fouteredge of the scoop and having a groove formed therein, the bottom wall of the groove being stepped, the Vlast-mentionedV portion 4 being provided with transverse passages to :50,receivc securing means for removably connecting abit to another face which is inclined inwardly froml the outer free end of the projecting end of the bottom face, the remaining p face being inclined downwardly Afrom the inner and second-mentioned yface 'and provided with a groove, the bottom wall of said c groove being stepped, the portion of the body between the first and last-mentioned faces having passages to receive securing means S670* for connecting the body to the bottom of the vscoop.- c c vsnursou LUTEs. 

